Clinker crushing furnace grate



Harry H. Culver H. H. CULVER CLINKER CRUSHING FURNACE GRATE Filed NOV. 26, 1948 Fig. 2.

Nov. 6, 1951 By WW 3M Patented Nov. 6, 1951 UNITED STATES PATENT OFFICE CLINKER CRUSHING FURNACE GRATE Harry H. Culver, Williamsport, Pa.

Application November 26, 1948, Serial No. 62,003 1 Claim. (01. 126-170) The present invention relates to new and useful improvements in grates for furnaces and more particularly to a rotary grate.

An important object of the invention is to provide a rotary grate of a polygonal shape to form a plurality of clinker crushing corners and providing a fixed internally toothed ring in which the grate works and against which the clinkers are crushed by the corners of the grate.

A still further object is to provide a device of this character of simple and practical construction, which is efficient and reliable in use, relatively inexpensive to manufacture and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a plan view of the grate with the furnace shown in section.

Figure 2 is an enlarged vertical sectional view taken substantially on a line 2-2 of Figure 1.

Figure 3 is a similar view on line 3-3 of Figure 2.

Figure 4 is a plan view of the table for the grate, and

Figure 5 is a perspective view of the shaft for the table.

Referring now to the drawing in detail wherein for the purpose of illustration I have disclosed a preferred embodiment of the invention, the numeral 5 designates an outer furnace jacket and the numeral 6 designates an inner furnace jacket in which a horizontal grate supporting bar I is suitably secured.

The central portion of bar I is formed with a raised apertured lug 8 in which a shaft 9 is positioned, the upper end of the shaft being formed with an annular flange I to which a sectional plate or table II is suitably secured. Ball bearings I2 are positioned between the boss 8 and flange II) to provide anti-friction means for the table II.

A grate is designated generally at I3 and comprises a flat top I4 of polygonal shape, preferably hexagonal, and is formed with sloping side edges I resting on the table II and having downwardly extending pinsalfi engaged in openings II in the plate to lock the grate on the plate. The table II and top of the grate I3 are formed with draft openings I8 and I9 respectively.

A ring is formed with a downwardly extend- 2 ing flange or skirt 2| at its edge to rest on bar I and is suitably secured in a fixed position within the inner shell 6. The ring 20 is formed with internal teeth 22 positioned in the plane of the top I4 of grate I3 and outwardly therefrom.

The table I I projects outwardly from the lower sloping edges I5 of grate I3 and the outer edge of table II is positioned under the teeth 22 as shown in Figure 2 of the drawing.

A pinion 23 is suitably secured to the lower end of shaft 9 under bar I and a rack 24 engages pinion 23. The rack bar is slidably supported in the furnace and projects outwardly at one side thereof and to the outer end of which is pivotally attached a lever 25.

In the operation of the device, the lever 25 is manipulated in a manner to slide the rack bar 24 forwardly and backwardly whereby to rotate pinion 23, shaft 9 and table II with the grate I3 secured thereon. The ashes and clinkers from the fire in the furnace work toward the outer edge of the grate during oscillation thereof and the clinkers come to rest on the table II outwardly of the grate I3 and are crushed and broken between the corners 2B of the hexagonally shaped grate and the teeth 22 of the ring 20 and then fall from the edge of the table.

The table II and grate I3 are constructed of sections to facilitate assembly thereof in the furnace.

The flange II! at the top of shaft 9 may be secured to the table II in any suitable manner, such as upstanding pins 21 on the flange engaged in openings 28 in the table.

In view of the foregoing description taken in conjunction with the accompanying drawings it is believed that a clear understanding of the device will be quite apparent to those skilled in this art. A more detailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shown and described a preferred embodiment of the invention the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and the scope of the appended claim.

Having described the invention, what is claimed as new is:

In a furnace structure, a stationary, internallytoothed clinker crushing ring in the furnace, and

i a furnace grate mounted in the furnace and comprising a fixed bar secured in a transverse position in the furnace under the crushing ring, a sectional table above the bar, a vertical shaft journaled in the bar, means locking the shaft to,

3 the underside of each section of the table to hold said. sections in assembled relation with each other, operating means connected to the lower end of the shaft for oscillating the shaft and table,

REFERENCES CITED The following references are of record in the file of this patent:

Number 4 UNITED STATES PATENTS Name Date Duncan Feb. 4, 1873 Salt et a1. Mar. 24, 1874 Sanderson June 9, 1896 Haug June 13, 1933 Van Ackeren Sept. 26, 1933 Davy Sept. 8, 1936 Corbett Nov. 14, 1939 

